However, there are a few celebs who have managed to look exactly the same some 10, even 15 years later. How? We really would like to know. We get it, they're rich and have access to so many things, but most are doing so without plastic surgery, just serums and creams.

After some heavy investigating, we decided to toss some pics of the always gorgeous Jennifer Aniston side by side, and wanted to see if you guys could guess which Jen is older.

255721 02: Jennifer Aniston poses January 4, 1996 in Aspen, CO. Along with her role as Rachel on the television show 'Friends,' actress Aniston starred in the films 'Picture Perfect' and 'She's The One.' (Photo by Russell Turiak/Liaison)

1997 Jennifer Aniston Stars In The Movie 'Til There Was You'. (Photo By Getty Images)

TORONTO, ON - SEPTEMBER 14: Actress/producer Jennifer Aniston arrives at the 'Life Of Crime' Premiere during the 2013 Toronto International Film Festival at Roy Thomson Hall on September 14, 2013 in Toronto, Canada. (Photo by Isaiah Trickey/FilmMagic)

HOLLYWOOD, CA - NOVEMBER 21: Actress Jennifer Aniston speaks onstage during a Q&A following the screening of 'Cake' during the 2014 Variety Screening Series at ArcLight Hollywood on November 21, 2014 in Hollywood, California. (Photo by Imeh Akpanudosen/Getty Images)

US actress Jennifer Aniston gestures as she poses during a photocall ahead of a diner for the launch of a Louis Vuitton leather goods collection in collaboration with US artist Jeff Koons, at the Louvre in Paris on April 11, 2017. / AFP PHOTO / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)